Yes, but fraternizing with the enemy also sounds like something that is frowned upon. I take he's a stickler for rules." That and he seemed borderline obsessed with him, leading Sherlock to believe if any wind of their interaction made its way to Moriarty, there would be problems.
He watches the man carefully. It's so interesting and peculiar, whatever relationship the man seems to have with his employer. Sherlock makes mental note to look I to it later, see what he can dig up and how correct his suspicions may be.
Sherlock peeks around the corner again and nods in Moran's direction. "Another alley, another time perhaps," he offers before turning to casually walk away.